Suppose you ride a bicycle in a 20-m-radius circle on a horizontal surface. the resultant force exerted by the surface on the bicycle (normal force plus frictional force) makes an angle of with the vertical.
(a) what is your speed?
(b) if the frictional force on the bicycle is half its maximum possible value, what is the coefficient of static friction?

The charge of an ion with 55 protons and 52 electrons is +3. the reason is because protons are positive, and there are three more than the amount of negative electrons.

Answer: 1.4 seconds which is the third optionexplanation: current is defined as the flow of charge per timetherefore, the equation that relates current, charge and time can be expressed as follows: i = δq / δtwhere: i is the current given = 1.8 ampereδq is the charge given = 2.5 coulombδt is the time required for the flow of the given charges to give the 1.8 ampere.substitute with the givens in the above equation to get the time as follows: 1.8 = 2.5 / δtδt = 2.5 / 1.8 = 1.38888 which is approximately 1.4 secondshope this was !